Antenna



FIG. 1 is a perspective top view of an antenna showing our new design;

FIG. 2 is a perspective bottom view of the antenna;

FIG. 3 is a first side elevation view of the antenna;

FIG. 4 is a second side elevation view of the antenna;

FIG. 5 is a third side elevation view of the antenna;

FIG. 6 is a fourth side elevation view of the antenna;

FIG. 7 is a top plan view of the antenna; and,

FIG. 8 is a bottom plan view of the antenna.

The broken line showing of a threaded member in the figures represents a portion of the antenna that forms no part of the claimed design. 

The ornamental design for an antenna, as shown and described. 